Balanced valve



Nov. 18, 1924- L. KASSANDER BALANCED VALVE Filed Dec. 5, 1921 R 0 T N E V m ATTORNEY Patented Nov. 19 24.

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nnoroma'Kassmvnnn or BALANCED VALVE.

Application filed December 5, 1921. Serial No. 520,003.

To all whom it may concern." v Be it known that I, LEOPOLD KAssaivnnn, a citizen of the United States, residing m the boroughof Manhattan, city, county, and

State of New York, have invented certaininspection and repair. The essential char-. a-cteristics of my invention Wlll sufiiciently appear from the illustration thereof herein 20 described and shown inthe accompanying drawings. M

Fig. 1 is a central vertical section of a valve structure embodying my invention and Fig. 2 is a cross section on line A-A of 25 Fig. 1. 1 4 e In the drawings, 1 is the valve casing, which may be attached to the boiler or other support by the support ing 2, the casing having the cap 3 screwing into its upper portion. Within the casing are inlet passage 4 and outlet passage 5 separated by wall 6 in which is port 7 and upon which is the seat 8 of the main valve 9. The inlet and outlet passages are suitably connected to the steam pipes.

Main valve 9 has upper. portion consisting of four vertical vanes 10 slidin freely on inner wall of cap 3, cylindrica extension 11- with'tubular bore 12 and lower piston 40 13 sliding freely on inner wall 14 of easing 1. Passages 15 lead from tubular bore in the cylindrical extension of main valve 9 to chamber 16 thereby afiording access to the underside of: piston 13. Main, valve 9 has annular shoulder. 17 surrounding an opening therethrough affording a seat for secondary valve 18, which fits closely between the vanes 10 of the main valve andis bored centrally for the greater upward portion thereof. I

Valve stem 19 has valve stem extension 20 of smaller cross section, the valve stem passing through the usual stuffing box 21 secured to the casing 1 by nut 22 and the shoulder 23 of the valve stem contacting with NEW YORK, N, Y., Assmnon To} NATHAN manuraorunnve COMIANY, or new YORK, N. "Y.

the piston 13 of themain valve as the valve I stem moves upward. The valve stem ex-' tension 20 passes through thepiston 13 and in its upward movement it is adapted to unseat the secondary valve.

- The valve stem may be moved upward 'by any convenient means, there being well .known in the art various forms of operating levers, latches,,latch' rods, quadrants and thelike, whereby the moving" of a lever manually will cause the valve stem to be forced 'upwards, There are also well known means, when the movement upward of the valve stem extension ceases, of locking the operating lever in the desired position and there= by retainingthe valve stem in any desired position; My invention does not relate .to means for operating or looking the valve stem.

The operation of this illustration of my invention is as follows:

When the main valve valve are closed and, respectively seated, the steam entering through" the inlet passage presses forcibly downward upon each of the valves and holds them tightly closed,

the construction of the main valve with its wings enabling the steam toreach freely the upper portion of the secondary valve. When it is desired to allow the travel of steam from the inlet passage to the outlet passage,-

the valve stem is caused to move upward, this movement first causing the valve stem extension to unseat the secondary valve,

I thereafter causing the shoulder of the valve stem to contact with the piston of the main valve. As soon as the secondary valve is unseated and before the shoulder ofbthe main valve, steam flows through the tubular bore and passages 15 of the main valve into the chamber 16, and thereupon exerts pressure upward upon the under surface of the thus permitting steam to leak into the outlet chamber from the pressure chamber.

The closure (if the main valve is accom' plished by ceasing to exert positive force and the secondary valve stem contacts with the piston of the upward suficient to overcome the difierential sure forcing them upon their seats.

the unseating or the secondary valve, the

' steam flows smoothly and uninterruptedly between the vanes of the main valve and through the port into the tubularbore until piston-like lower it reaches the chamber under the piston, where the steam exerts its pressure upwards and against the steam pressure upon the upper part iof the main valve. The tubular bore, the passagesand the chamber cause an almost immediate response to the opening of the secondary valve and the consequent. upward pressure upon the piston. The facility, and completeness of discharge from the valve by the upward movement of the piston is also one of the char-- acteristics of this invention.

What ll claim is:

l. llncombination, a valve casing; an in: let chamber; a discharge chamber; a main valve with upper and lower portions fitting and slidable in theinterior wall of the valve casing, the main valve seating on a seat surrounding a port in the partition between the inlet chamber and the outlet chamber; a passage through the main valve from the inlet chamber to a chamber underneath the portion of the main valve; a secondary valve with recessed topadaptecl when seated to close said passage and slide on inner wall of main valve and means for unseatin said valves.

' 2. In com ination, a valve casing; inlet and outlet chambers therein separated by a partition with a port therein adapted for the seating of amain valve; a cylindrical ma n valve within which a valve stem may rec procate; a shoulder on the main valve; a passage through the main valve from the inlet chamber to a pressure chamber; a secondary valve for seatin on said shoulder of the main valve and slidable on the inner wall of the main valve and adapted when seated to close said passage through the maln valve from the inlet chamber to said pressure chamber; a'valve stem reciprocable within the main valve and adapted to unseat the main and secondary valves by con tacting with same.

' 3. In combination, a. valve casing; inlet and outlet chambers therein separated by a partition with a port therein adapted for the seatin -of a main valve; amain valve within Wlllfihh. valve stem may reciprocate, having an up er extension adapted to guide said valve within said casing and within which extension. a secondary valve may releasereeiprocate; a secondaryvalve for seating on the main valve and adapted when seated to close a passage through the main. valve from the inlet chamber to a pressure chamber beneath the main valve; a valve stem reciprocating within the main valve and adapted to unseat the secondary valve; a pressure chamber beneath the main valve;

a assage through the mainvalve from the a secondary valve adapted when seated on the main valve to close a passage in the main valve from the inlet chamber to a chamber beneath the piston-like lower portion of the main valve; a valve stemadapted ill to contact with and unseat the secondary v and main valves. r

5. In combination, a valve casing; inlet and outlet chambers therein with a separ rating partition having a port upon which may beseated a main valve; amain valve having an upper portion of greater horif zontal area than its lower and piston-like portion; a secondary valve with recessed top adapted when seated on the main valve to close a passage in the main valve from the inlet chamber, said passage communicating through said lower portion with a chamber beneath same; a'valve stem adapted to con tact with and unseat the secondary andmain valves.

6. In combination, a valve casing; inlet and outlet chambers therein with a separating partition having a port'upon which may be seated a main valve; a main valve having an upper portion of greater horizontal area than its lower and piston-like portion; a secondary valve with recessed top adapted when seated. on the main valve to close a passage in the main valve from the inlet chamber, said passage communicating through said lower portion with a chamber beneath same;'a valve stem having a portion moving through the main valve for operating the secondary valve; and a adapted to unseat-the main valve after the secondary valve has been unseated, said stem being separate from the valve structures.

7. In combination, a valve casing; inlet and outlet chambers therein with a separatortion ing partition having a port upon which may v be seated a main valve; a main valve having an upper portion of greater horizontal area than its lower and piston-hire portion; a secondary valve with recessed top adapted when H seated on the main valve to close a passage in the main valve from the inlet chamber, said passage communicating through said lower portion with a chamber beneath same and in which said lowerand piston-like portion is slidable; and a valve stem adapted to contact with and unseat the secondary valve and then the main valve.

8. A valve assembly, comprising a valve casing; inlet and outlet chambers therein with a separating partition having a port for the seating of a main valve; a main valve having an upper portion of greater horizontal area than its lower and pistonlike portion, said upper portion being provided with vanes slidable on the inner wall of said casing; a secondary'valve with recessed top slidable on the inner wall of the main valve and adapted when seated on the main valve to close a passage in the main valve from the inlet chamber, said passage communicating through said lower portion with a chamber beneath same and in which said lower and piston-like portion is slidable; and a valve stem adapted to contact with and unseat the secondary valve and then the main valve.

9. A valve assembly, comprising a valve casing; curved inlet and outlet chambers therein with a separating partition having a port for the seating of a main valve; a main valve provided with vanes slidable on the inner wall of said casing; a secondary valve slidable on the inner wall of the main valve and adapted when seated on the main valve to close a passage in the main valve from the inlet chamber, said passage communicating with a chamber beneath the main valve, a piston portion of the main valve being slidable in said chamber, and means for unseating the secondary and main valves.

10. In combination, a valve casing, inlet and outlet chambers therein with a separating partition having a port on which may be seated a main valve; a main valve having an upper portion of greater horizontal area than a lower and piston-like portion;

a secondaryvalve with recessed top, adapt- I ed when seated on the main valve to close a passage in the main valve from the inlet chamber, said passage communicating through said lower portion with a chamber beneath same and in which said lower portion is slidable; and a valve stem ada ted to contact with and unseat the secon ary valve and then the main valve.

LEOPOLD KASSANDER. 

